Buggy code:
public class ZipArchiveOutputStream extends ArchiveOutputStream { static final int BYTE_MASK = 255 ; private static final int SHORT = 2 ; private static final int WORD = 4 ; static final int BUFFER_SIZE = 512 ; protected boolean finished = false ; private static final int DEFLATER_BLOCK_SIZE = 8192 ; public static final int DEFLATED = ZipEntry . DEFLATED ; public static final int DEFAULT_COMPRESSION = Deflater . DEFAULT_COMPRESSION ; public static final int STORED = ZipEntry . STORED ; static final String DEFAULT_ENCODING = ZipEncodingHelper . UTF8 ; public static final int EFS_FLAG = GeneralPurposeBit . UFT8_NAMES_FLAG ; private ZipArchiveEntry entry ; private String comment = "" ; private int level = ZipArchiveOutputStream . DEFAULT_COMPRESSION ; private boolean hasCompressionLevelChanged = false ; private int method = ZipEntry . DEFLATED ; private final List entries = new LinkedList ( ) ; private final CRC32 crc = new CRC32 ( ) ; private long written = 0 ; private long dataStart = 0 ; private long localDataStart = 0 ; private long cdOffset = 0 ; private long cdLength = 0 ; private static final byte [ ] ZERO = new byte [ ] { 0 , 0 } ; private static final byte [ ] LZERO = new byte [ ] { 0 , 0 , 0 , 0 } ; private final Map offsets = new HashMap ( ) ; private String encoding = ZipArchiveOutputStream . DEFAULT_ENCODING ; private ZipEncoding zipEncoding = ZipEncodingHelper . getZipEncoding ( ZipArchiveOutputStream . DEFAULT_ENCODING ) ; protected final Deflater def = new Deflater ( level , true ) ; private final byte [ ] buf = new byte [ ZipArchiveOutputStream . BUFFER_SIZE ] ; private final RandomAccessFile raf ; private final OutputStream out ; private boolean useUTF8Flag = true ; private boolean fallbackToUTF8 = false ; private ZipArchiveOutputStream . UnicodeExtraFieldPolicy createUnicodeExtraFields = ZipArchiveOutputStream . UnicodeExtraFieldPolicy . NEVER ; public ZipArchiveOutputStream ( OutputStream out ) { } public ZipArchiveOutputStream ( File file ) throws IOException { } public boolean isSeekable ( ) { } public void setEncoding ( final String encoding ) { } public String getEncoding ( ) { } public void setUseLanguageEncodingFlag ( boolean b ) { } public void setCreateUnicodeExtraFields ( ZipArchiveOutputStream . UnicodeExtraFieldPolicy b ) { } public void setFallbackToUTF8 ( boolean b ) { } public void finish ( ) throws IOException { } public void closeArchiveEntry ( ) throws IOException { } public void putArchiveEntry ( ArchiveEntry archiveEntry ) throws IOException { } public void setComment ( String comment ) { } public void setLevel ( int level ) { } public void setMethod ( int method ) { } public boolean canWrite ( ArchiveEntry ae ) { if ( ae instanceof ZipArchiveEntry ) { ZipArchiveEntry ze = ( ( ZipArchiveEntry ) ( ae ) ) ; return ( ! ( ze . isEncrypted ( ) ) ) && ( ( ( ze . getMethod ( ) ) == ( ZipArchiveOutputStream . STORED ) ) || ( ( ze . getMethod ( ) ) == ( ZipArchiveOutputStream . DEFLATED ) ) ) ; } <START_BUG> return super . canWrite ( ae ) ; <END_BUG> } public void write ( byte [ ] b , int offset , int length ) throws IOException { } public void close ( ) throws IOException { } public void flush ( ) throws IOException { } static final byte [ ] LFH_SIG = ZipLong . LFH_SIG . getBytes ( ) ; static final byte [ ] DD_SIG = ZipLong . getBytes ( 134695760L ) ; static final byte [ ] CFH_SIG = ZipLong . CFH_SIG . getBytes ( ) ; static final byte [ ] EOCD_SIG = ZipLong . getBytes ( 101010256L ) ; protected final void deflate ( ) throws IOException { } protected void writeLocalFileHeader ( ZipArchiveEntry ze ) throws IOException { } protected void writeDataDescriptor ( ZipArchiveEntry ze ) throws IOException { } protected void writeCentralFileHeader ( ZipArchiveEntry ze ) throws IOException { } protected void writeCentralDirectoryEnd ( ) throws IOException { } protected final void writeOut ( byte [ ] data ) throws IOException { } protected final void writeOut ( byte [ ] data , int offset , int length ) throws IOException { } private void deflateUntilInputIsNeeded ( ) throws IOException { } private void writeVersionNeededToExtractAndGeneralPurposeBits ( final int zipMethod , final boolean utfFallback ) throws IOException { } public static final class UnicodeExtraFieldPolicy { public static final ZipArchiveOutputStream . UnicodeExtraFieldPolicy ALWAYS = new ZipArchiveOutputStream . UnicodeExtraFieldPolicy ( "always" ) ; public static final ZipArchiveOutputStream . UnicodeExtraFieldPolicy NEVER = new ZipArchiveOutputStream . UnicodeExtraFieldPolicy ( "never" ) ; public static final ZipArchiveOutputStream . UnicodeExtraFieldPolicy NOT_ENCODEABLE = new ZipArchiveOutputStream . UnicodeExtraFieldPolicy ( "not<seq2seq4repair_space>encodeable" ) ; private final String name ; private UnicodeExtraFieldPolicy ( String n ) { } public String toString ( ) { } } public ArchiveEntry createArchiveEntry ( File inputFile , String entryName ) throws IOException { } }

Fix:
return false ;